KobaltPlugin template.

modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/api/IInitContributor.kt

@@ -27,6 +27,11 @@ interface IArchetype {
      */
     val pluginName: String
 
+    /**
+     * Instructions to display to the user after a template has been generated.
+     */
+    val instructions : String get() = "Build this project with `./kobaltw assemble`"
+
     /**
      * Generate the files for this archetype. The parameter is the arguments that were passed to the kobaltw
      * command.

src/main/kotlin/com/beust/kobalt/app/JarTemplate.kt

@@ -0,0 +1,49 @@
+package com.beust.kobalt.app
+
+import com.beust.kobalt.Args
+import com.beust.kobalt.api.IArchetype
+import com.beust.kobalt.misc.log
+import java.io.File
+import java.io.FileOutputStream
+import java.util.jar.JarInputStream
+
+/**
+ * Base class for templates that simply decompress a jar file to generate their project.
+ */
+abstract class JarTemplate(val jarName: String) : IArchetype {
+    companion object {
+        fun extractFile(ins: JarInputStream, destDir: File) {
+            var entry = ins.nextEntry
+            while (entry != null) {
+                val f = File(destDir.path + File.separator + entry.name)
+                if (entry.isDirectory) {
+                    f.mkdir()
+                    entry = ins.nextEntry
+                    continue
+                }
+
+                log(2, "Extracting: $entry to ${f.absolutePath}")
+                FileOutputStream(f).use { fos ->
+                    var read = ins.read()
+                    while (ins.available() > 0 && read != -1) {
+                        fos.write(read)
+                        read = ins.read()
+                    }
+                }
+                entry = ins.nextEntry
+            }
+        }
+
+        fun log(level: Int, s: String) {
+            println("   " + s)
+        }
+    }
+
+    override fun generateArchetype(args: Args, classLoader: ClassLoader) {
+        log(1, "Generating archetype for Android with class loader $classLoader")
+        val destDir = File(".")
+        val ins = JarInputStream(classLoader.getResource(jarName).openConnection().inputStream)
+        extractFile(ins, destDir)
+    }
+
+}

src/main/kotlin/com/beust/kobalt/app/KobaltPluginTemplate.kt

@@ -0,0 +1,19 @@
+package com.beust.kobalt.app
+
+import com.beust.kobalt.api.IInitContributor
+import com.beust.kobalt.plugin.KobaltPlugin
+
+/**
+ * Template that generates a Kobalt plug-in project.
+ */
+class KobaltPluginTemplate : IInitContributor {
+    val pluginArchetype = object: JarTemplate("templates/plugin.jar") {
+        override val archetypeDescription = "Generate a sample Kobalt plug-in project"
+
+        override val archetypeName = "kobalt-plugin"
+
+        override val pluginName = KobaltPlugin.PLUGIN_NAME
+    }
+
+    override val archetypes = listOf(pluginArchetype)
+}

src/main/kotlin/com/beust/kobalt/app/ProjectGenerator.kt

@@ -2,7 +2,6 @@ package com.beust.kobalt.app
 
 import com.beust.kobalt.Args
 import com.beust.kobalt.api.IArchetype
-import com.beust.kobalt.api.IInitContributor
 import com.beust.kobalt.internal.PluginInfo
 import com.beust.kobalt.misc.log
 import com.beust.kobalt.misc.warn
@@ -27,6 +26,7 @@ class ProjectGenerator @Inject constructor(val pluginInfo: PluginInfo){
             if (archetype != null) {
                 log(2, "Running archetype $archetypeName")
                 archetype.generateArchetype(args, classLoader)
+                log(1, "\n\n" + archetype.instructions)
             } else {
                 warn("Couldn't find any archetype named $archetypeName")
             }

src/main/resources/META-INF/kobalt-core-plugin.xml

@@ -21,5 +21,8 @@
         <class-name>com.beust.kobalt.internal.TestNgRunner</class-name>
         <class-name>com.beust.kobalt.internal.SpekRunner</class-name>
 
+        <!-- Templates -->
+        <class-name>com.beust.kobalt.app.KobaltPluginTemplate</class-name>
+
     </plugin-actors>
 </kobalt-plugin>